COMPOSITAE (composite FAMILY) 



84^ 



lOUT. M. inodora 

 Leaf X 1%, 



N. Y., and Pa.; 



strongly S-ribbed ; pappus a short crown or border. — Road- 

 sides and fields, Nfd. to Ct. and Mich. ; abundant in e. Me. and 

 adjacent Canada. July, Aug. (Nat. from Eu.) Fig. 1007. 



2. M. CuAMOMiLLA L. Similar ; heads smaller, about 2 

 cm. broad ; rays shorter ; receptacle more convex ; achenes 

 less distinctly ribbed ; pappus obsolete. — Roadsides and waste 

 places, Atlantic States, west to 0. (Adv. from Eu.) 



3. M. suAvioLENS (Pursh) Buchenau. (Pineapple-weed.) 

 Low ; leaves 2-3-pinnately-parted into short linear lobes ; 

 heads rayless, short-peduncled ; bracts oval, with broad mar- 

 gins, much shorter than the conical disk ; achenes more 

 terete ; pappus obsolete ; odor of the bruised plant suggesting 

 pineapple. (M. discoidea DC. ; M. matricarioides Porter.) 

 — Roadsides and old fields, locally abundant in N. B., N. E., 

 also about St. Louis, Mo.; naturalized, probably from the 



Pacific slope, where it is common. (Established in n. Eu.) 



70. CHRYSANTHEMUM [Toum.] L. Ox-btb Daisy 



Heads many-flowered ; rays numerous, fertile. Scales of the broad and flat 

 involucre imbricated, with scarious margins. Receptacle flat or convex, naked. 

 Disk-corollas with a flattened tube. Achenes of disk and ray similar, striate. 

 — Annual or perennial herbs, with toothed, pinnatifid, or divided leaves, and 

 single or corymbed heads. Rays white or yellow (rarely wanting); disk yellow. 

 (Old Greek name, xpuo^ii >'*«/«»', i-e. golden flower.) 



* Heads large, solitary, terminating the long branches. 



1. C. LeucAnthemum L. (Ox-eye or White Daisy, Marguerite, White- 

 weed.) Stem erect, simple or forked toward the summit; basal leaves spatu- 

 late-obovate, on long slender petioles, the blades crenate-dentate ; middle and 

 upper stem-leaves oblong or oblanceolate, coarsely and 

 regularly crenate or dentate above, with larger spreading 

 teeth at base; heads 4-6 cm. broad; involueral bracts 

 narrow, brown-margined ; rays white (rarely tubular, 

 laoiniate, or deformed). — Fields, etc., Nfd. and e. Que. 

 to N. J.; rare southw. June-Aug. 

 (Nat. from Eu.) Fig. 1008. 



Var. piNNATfEiDUM Lecoq & La- 

 motte. Basal leaves pinnatifid, subpin- 

 natifid, or coarsely and irregularly 

 toothed ; middle and upper stem-leaves 

 narrowly oblong or oblanceolate, con- 

 spicuously subpinnatifid at base ; heads 

 usually smaller than in the typical 

 form. (Var. subpinnatijidum Fernald.) 

 — Fields and meadows, throughout ; an 

 abundant and pernicious weed eastw. 

 (Nat. from Eu.) Fig. 1009. 



2. 0. SEGETUM L. (Corn Chrysanthemum, Corn Mari- 

 gold.) Similar ; leaves oblong, somewhat clasping, coarsely 

 toothed or pinnatifid ; rays golden-yellow ; bracts broad and 

 scarious. — Ballast along the coast, N. B. to N. J.; also in fields 

 aear Schenectady, N. Y. ( Wibbe). (Adv. from Eu.) 

 * * Heads small, corymbed. 



3. C. PARTHiiNiUM (L.) Bernh. (Feverfew.) Tall, branched, leafy; ieaws 

 bipinnately divided, the divisions ovate, cut ; rays white. — Escaped from gar- 

 dens, and naturalized in some places. (Introd. from Eu.) 



4. 0. BalsAmita L., var. tanacetoIdes Boiss. (Costmary, Mint Geea- 

 IMUM.) Leaves oblong, crenate, the upper sessile, the lower petioled, often 



1008. 



C. Leucanthetnum, 

 Leaves x %. 



1009. C. Leuc, 



V. pinuat. 



Leaves X V^. 



